859867 has 4 divisors (see below), whose sum is σ = 871720. Its totient is φ = 848016.

The previous prime is 859861. The next prime is 859891. The reversal of 859867 is 768958.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 768958 = 2 ⋅384479.

It is a cyclic number.

It is not a de Polignac number, because 859867 - 2¹⁹ = 335579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5817 + ... + 5962.

It is an arithmetic number, because the mean of its divisors is an integer number (217930).

2⁸⁵⁹⁸⁶⁷ is an apocalyptic number.

859867 is a deficient number, since it is larger than the sum of its proper divisors (11853).

859867 is a wasteful number, since it uses less digits than its factorization.

859867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11852.

The product of its digits is 120960, while the sum is 43.

The square root of 859867 is about 927.2901379827. The cubic root of 859867 is about 95.0919515982.

Subtracting from 859867 its reverse (768958), we obtain a palindrome (90909).

The spelling of 859867 in words is "eight hundred fifty-nine thousand, eight hundred sixty-seven".